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Author Question: An electric car is designed to run off a bank of 12-V batteries with total energy storage of 6.0 ... (Read 63 times)

crobinson2013

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on: Jul 28, 2018
An electric car is designed to run off a bank of 12-V batteries with total energy storage of 6.0  107 J. If the electric motor draws 6000 W in moving the car at a steady speed of 10 m/s, how far will the car go before it is out of juice?
 a. 150 km
  c. 100 km
  b. 50 km
  d. 25 km

Question 2

A figure skater on ice with arms extended, spins at a rate of 3.5 rev/s. After he draws his arms in, he spins at 6.0 rev/s. By what factor does the skater's kinetic energy change when he draws his arms in?
 a. 2.4
  c. 0.58
  b. 1.7
  d. 0.12


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SeanoH09

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Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

B


crobinson2013

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Reply 2 on: Jul 28, 2018
Excellent

Animal_Goddess

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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